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Finding the Fourth Proportional to 11,671.40, 17,504.40 and 3,878.12

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Solution

The fourth proportional to 11,671.40, 17,504.40 and 3,878.12 is: 5,816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,671.40 : 17,504.40 = 3,878.12 : x
  2. Step 2: Convert to fraction form
    11,671.40/17,504.40 = 3,878.12/x
  3. Step 3: Cross multiply
    11,671.40x = 17,504.40 × 3,878.12
  4. Step 4: Simplify right side
    11,671.40x = 67,884,163.73
  5. Step 5: Solve for x
    x = 67,884,163.73/11,671.40
  6. Step 6: Final answer
    x = 5,816.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.